Pasteurizer



K. K. WRIGHT. PASTEUR|ZER. APPL-NATION FILED JULY 6.1917.

Patented May 10,11921.

2 SHEETSSHEET I.

K. K; WEIGHT. PASTEURIZER.

APPLICATION FILED JULY 6, I9I7.

atented May MI5 1921'.

2 SHEES-SHEET 2.

[NVE/VTM? f fw* fyi-f 577%@ KIRK K. WRIGHT, OF BUFFALO, NEW" YQRK,ASSIGNOR OF ONE-HALF T0 RALPH G WRIGHT, 0F BUFFALO, NEW YRK. l

PASTEURIZER.

Specification of Letters Patent.

Patented May 10, 1921.

To alt 'whom t may concern.'

Be it known that l, Kinn K. VRIGHT, a citizen of the United States,residing at Buffalo, in the county of Erie and State of New York, haveinvented a new and useful improvement in Fasteurizers, of which thefollowing is a specilication.

This invention relates to pasteurizers, and more particularly toapparatus of the kind consisting of a receptacle adapted to receive thearticles to be pasteurized and into which the pasteurizing medium isadmitted.

The objects of this invention are to provide a pasteurizer of this kindwith means of improved construction for producing a circulation of thepasteurizing medium within the receptacle to obtain a uniformtemperature in all parts of the receptacle; also to provide the frontwall of the pasteurizer with a removable portion of improvedconstruction which can be readily placed into and out of operativeposition; also to improve the construction of devices of this kind inother respects hereinafter specified.

In the accompanying drawings:

Figure l is a perspective view of a pasteurizer embodying the invention.

Fig. 2 is a longitudinal sectional elevation thereof, on an enlargedscale, on line 2 2, Fig. 4.

Fig. 3 is a fragmentary elevation, on a still larger scale, of meansembodying the invention for producing a circulation of the pasteurizingmedium in the receptacle.

Fig. 4C is a transverse sectional elevation on line 4--4, Fig. 2.

Fig. 5 is a fragmentary front elevation, on an enlarged scale, of thepasteurizer showing means embodying the invention for closing thepasteurizer receptacle.

Figs. 6 and 7 are fragmentary transverse sectional elevations thereofshowing respectively the closed and open positions of the receptacleclosing means.

A represents a box or receptacle in which the articles to be pasteurizedare placed, and which includes a front wall a, a hinged cover or lid awhich may be opened for placing articles to be pasteurized into thereceptacle and removing, the same therefrom. The receptacle is providedwith the usual slatted floor a2 on which the articles B to bepasteurized are supported. The articles B shown in the drawings arecrates containing bottles of milk but it is understood that theapparatus is not limited to be used only in pasteurizing crates ofbottled milk but can be used for pasteurizing other articles. llhe wallsof the box may be made of any suitable material, being preferably madewith an outer layer or part C, an intermediate partition c of insulatingmaterial, and an inner lining or wall c. A receptacle of any other kindmay be employed for this purpose. I

ln a pasteurizer of this kind, steam is generally employed to heat theinterior of the receptacle to the desired temperature, and after tli'e.articles have been subjected to the pasteurizing temperature of thesteam for the desired period of time, water is passed into thepasteurizer for cooling the articles before removing the same from thepasteurizer. I n the construction shown the steam is admitted into thebox A. of the pasteurizer by means of a steam pipe D which enters thereceptacle and extends lengthwise in the upper portion thereof, andwhich is provided with any desired number of branch pipes Z extendingdownwardly adjacent to the rear wall of the receptacle and connectedwith a number of discharge pipes c3 having discharge openings arrangedbelow the floor a2. The cooling water may be admitted to the pipes d bymeans of a water pipe F extending through the top wall of the receptacleand extending lengthwise of the receptacle adjacent to ithe rear wallthereof and having branch pipes e connecting with the branch pipes (Z toadmit the water to the discharge pipes d. rIhe flow of steam and waterin the pipes D and E may be controlled by any suitable means, `such asvalves Z2 c2 arranged in the steam and water pipes outside of thereceptacle. lil represents an overflow pipe through which the waterpasses out of the receptacle vwhen the sameis filled above the desiredlevel. All of these parts have heretofore been used in pasteurizers andof themselves constitute no pait of this invention.

it has been found that when steam is admitted to the pasteurizerreceptacle, the temperature within the receptacle is not uniform in allparts thereof until the steam i has been turned on for a considerablelength of time, so that all of the milk bottles in the receptacle do notreceive the saine treatment. ln order to avoid this defect inpasteurizers as heretofore constructed, means are provided for causing acirculation of the air, steam7 or other pasteurizing medium within thereceptacle. In the construction shown for this purpose, a circulatingdevice or ejector F is provided in each of the branch pipes Z in theupper portion of the receptacle A. Each ejector has a housing providedwith inlet openings f for the air and steam in the upper portion of thereceptacle, and a steam nozzle f connected with the steam pipe D. Thedischarge end of the ejector F is connected with the pipe cl. By meansof this construction when a jet of steam is blown through the nozzle finto the ejector F, air and steam from the upper portion of thepasteurizer receptacle are drawn in through 'the openings 7 and passwith the steam entering through the nozzle f through the pipes d and CZto the lower portion of the 'receptacle. This produces a circulation' ofIthe pasteurizing medium within the receptacle and insures a uniformtemperature in all parts of the receptacle. The ejectors F do notinterfere with the passing of water into the receptacle since no harm isdone if the water passes through the ejectors F.

Means are preferably provided for removing a part of the front wall ofthe receptacle to permit the articles to be pasteur- Vized to be morereadily placed into or removed from the receptacle, and for readilysecuring the removable portion in its operative position in thereceptacle. In the construction shdwn for this purpose, the front wallis provided with a portion or section G, which may be removed fromitsoperative position in which it forms substantially a continuation of thefront wall of the receptacle, to a position in which it does notinterfere with the placing of the articles to be pasteurized into thereceptacle, or removing the same therefrom. The removable section Gr ofthe front wall of the receptacle is preferably made of the same materialas the body portion of the box and is provided at its edges with pads orpacking strips g which insure a tight closing of the receptacle. Theupper edge of the removable section G is preferably made to form a tightjoint with the front edge of the lid va of the receptacle.

The removable section G is slidably arranged on rods or links I-I whichare pivotally secured on brackets 7L secured on the front wall of thereceptacle and which pass through holes or slots formed in brackets itft2 4secured on the removable section G, so as to permit the section Gto move lengthwise of the rods or links H. The outer ends of the rods orlinks II are preferably provided with suitable means for clamping thelid or cover a of the receptacle in its closed position. In theconstruction shown for this purpose, cam levers I are provided at theouter ends of the links and are adapted to engage bearing straps or barst' secured on the lid a so that when the cam levers are moved intooperative or clamping position, the lid will be drawn tightly againstthe upper edge of the removable section G, and will press the removablesection firmly into engagement with the wall a. Then the pressure of thecam levers is released, the links or members H may be swung to theposition shown in Fig. 7 in 'which the removable section drops below theupper edge of the wall a, so that case of milk bottles may be placed onthe upper edge of the front wall a without resting on or damaging theremovable section u, as would be the case if this section were hinged onthe front wall or otherwise supported 'near the upper edge thereof.

The pasteurizer embodying the improvements described is thoroughlyefficient in operation since it insures a uniform temperature in allparts of 'the pasteurizer 'receptacle so that all of the articles to bepasteurized subjected to the same temperature. In order to secure auniform distribution of the steam or other pasteurizing mediumV in thelower portion of the receptacle, a small quantity of water is preferablyleft in the bottom of the receptacle7 through which the mixture of steamand air or other Huid from the upper portion of the receptacle ispassed. The removable portion of the front wall of the pasteurizerreceptacle greatly facilitites the placing of the crates into thepasteurizer and the removal of the same, since it is desirable to makethe pasteurizer of sufficient height to accommodate three tiers ofcrates, and some ice if the same is to be used for cooling the milkafter pasteurizing. This height would make it awkward to remove thecrates if a portion of the front wall were not made removable I claim asmy invention:

l. A pasteurizer including a receptacle adapted to contain the articlesVt0 be pasteurized, a pipe for admitting steamto the bottom of saidreceptacle, and `an ejectorin said pipe arranged in the upper portion ofsaid receptacle, said ejector mixing the incoming 'steam with air andsteam drawn into the ejector from the upper portion of the receptacleand' causing the mixture to be discharged into the bottom of saidreceptacle.

2. A pasteurizer including a receptacle Vadapted to contain the articlesto be pasteurized, a pipe for admitting steam to the bottom of saidreceptacle, and a mixing device in said pipe adapted to mix incomingsteam with steam 'and air from said receptacle, said mixing deviceincluding inlet openings arranged adjacent to the upper portion of saidreceptacle through which air and steam in said receptacle is drawn intosaid mixing device and passed with the incoming steam to the bottom ofsaid receptacle.

3. A pasteurizer including a receptacle adapted to contain the articlesto be pasteurized, a pipe for admitting steam to said receptacle, aplurality of distributing pipes connected with said admission pipe andhaving discharge openings arranged at intervals adjacent to the bottomof said receptacle, ejectors in each of said distributing pipes arrangedin the upper part of said receptacle and having inlet openings for thesteam and air in said receptacle whereby the steam blown into saidreceptacle is mixed with the air and steam from the upper part of saidreceptacle and is discharged into the bottom of said receptacle.

4. A pasteurizer including a receptacle adapted to contain the articlesto be pasteurized, a pipe for admitting steamto the bottom of saidreceptacle, and an ejector in said pipe arranged in the upper portion ofsaid receptacle, said ejector mixing the incoming steam with air andsteam drawn into the ejector from the upper portion of the receptacleand causing the mixture to be discharged into the bottom of saidreceptacle, and a water inlet pipe connected with said admission pipefor admitting water to said receptacle.

5. A pasteurizer including a receptacle adapted to receive the articlesto be pasteurized and the pasteurizing medium, means in said receptaclefor introducing the pasteurizing medium, said receptacle having uprightside walls, a removable portion in the upper end of one of said sidewalls, rods pivoted on said side walls, and a sliding connection betweensaid rods and said removable portion.

6. A pasteurizer including a receptacle adapted to receive the articlesto be pasteurized and the pasteurizing medium, means in said receptaclefor introducing the pasteurizing medium, said receptacle havlng uprightside walls, a removable portion in the upper end of one of said sidewalls,

' wall and on which said removable portion is slidably mounted, andmeans on the outer ends of said rods adapted to engage said cover forpressing the same against said removable portion of said side wall.

8. A pasteurizer including a receptacle adapted to receive the articlesto be pasteurized and the pasteurizing medium, means in said receptaclefor introducing the pasteurizing medium, said receptacle having uprightside walls, and a cover, a removable portion at the upper end of one ofsaid side walls, a plurality of pairs of parallel rods connected attheir ends, each pair of rods being pivoted at one end on said wall, asliding connection between said rods and said removable portion wherebythe removable portion can slide lengthwise of said rods, and a cam leveron the outer ends of each pair of rods and adapted to .engage said coverto press the same against said removable portion and thereby press saidremovable portion against said wall.

Witness my hand, this 11th day of June,

KIRK K. WRIGHT. Witnesses F. M. PRATT, B. HANNERKAM.

